At Church our internet almost never works. Allow bookmarks and personalized data to be stored locally so it works without internet.
The Windows 10 Gospel Library App works very poorly when there is no internet connection, which is usually the case at Church. Bookmarks and personalized comments should be stored locally so that the app works well without internet connectivity. When connectivity is restored, updated can then propagate to the server and other devices with the same login.
These features already function without a connection and upload updated annotations when they are reconnected. If you are having issues with this, you’re running into a bug and you’ll need to contact user support.